[PATCH] Support Sourcery CodeBench MIPS toolchain

[Simon Atanasyan]

================
Comment at: lib/Driver/ToolChains.cpp:2379
@@ +2378,3 @@
+  if (GCCInstallation.isValid() && isMipsArch(getTriple().getArch())) {
+    Twine MipsInc = GCCInstallation.getInstallPath() + "/include";
+    if (llvm::sys::fs::exists(MipsInc))
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Rafael Ávila de Espíndola wrote:
> It is dangerous to use Twine like this. I think this case is safe, but a change to, for example, compute a string in getInstallPath instead of just returning a StringRef to a member would break this.
> 
> Can you add a trivial addExternCSystemIncludeIfExits with a Twine argument to avoid this? Or maybe addExternCSystemInclude itself could check if thee directory exit?
I prefer to make addExternCSystemIncludeIfExits(). It's a good idea to move path existence checking to the addExternCSystemInclude(). But I think this change should be made by a separate commit.


http://llvm-reviews.chandlerc.com/D644